Abstract: Because of the need to improve the productivity of forage legume crops and satisfy the demand for lablab (Lablab purpureus L. Sweet) herbage by livestock owners, this study was done The experiment entailed field trials that were conducted to evaluate the response of fresh and dry herbage yield of lablab to phosphorus application and cutting treatments. The treatments were factorial combinations of four rates of phosphorus application (0, 12, 24 and 36 kg P ha-1). As well as two cutting heights (10 and 20 cm) combined with four ages of cutting (6, 12, 18 weeks and at maturity) in a split plot design with three replications. The highest fresh (39.7 t ha-1) and dry (10.2 t ha-1) herbage yields of lablab, were obtained from the 18 week age of cutting. The dry herbage (10.2 t ha-1) which was obtained at 18 weeks was 67 and 117% higher than those obtained at the maturity age of cutting and the 6 week age of cutting, respectively. Cutting at 6 weeks consistently produced the lowest herbage yields (5.0 and 4.7 t ha-1 for fresh and dry components, respectively). It is suggested that lablab herbage be fed before seed maturity than after it is mature. This will reduce dry matter wastage by 67.0% and also to develop lablab as a ley pasture crop in the farming systems of sub-humid savanna and enhance its usefulness as a source of livestock feed. In all of the three years of experimentation, there was no effect of cutting height on the different herbage yields.